Role

When the player reaches the pond, the forest will freeze; thus giving the player access to the cave Kyurem is in. Once the player has captured or defeated Kyurem, the cave's deepest part is no longer accessible after leaving the area; if Kyurem is defeated, the cave's deepest part will become accessible again after defeating the Pokémon League again.

In the years between Black and White and Black 2 and White 2, the path from Lacunosa Town here has been blocked by a landslide. However, only a boulder blocks the path, which can be pushed with Strength.

In Black 2 and White 2, the player encounters Team Plasma here once again, and the Plasma Frigate is docked in the crater's forest. The frigate has frozen over many of the trees, creating an icy hill on top of which the frigate is docked. Rood of the Seven Sages along with several old Team Plasma members confront the new Team Plasma; this gives the player the opportunity to sneak aboard the Plasma Frigate, where they fight Colress and run into Ghetsis. The player follows Ghetsis out of the ship after defeating the Shadow Triad. At the end of the cave, Ghetsis appears and tries to freeze the player alive with Kyurem's Glaciate, but are saved by N and his ZekromB2/ReshiramW2 flying down from above. Ghetsis then reveals he tricked N into coming here so Ghetsis could fuse with N's dragon. Ghetsis then uses the Ghetsis Stick to control Kyurem, who then proceeds to fuse with N's dragon with the DNA Splicers, forcing the player to fight BlackB2/WhiteW2 Kyurem. Afterwards, the player fights Ghetsis himself.

After defeating Ghetsis, he goes into madness, causing the Shadow Triad appear and take him away, leaving the Ghetsis Stick. Outside, the Plasma Frigate has left. Rood and his team wait to tell the player that Colress has disbanded the new Team Plasma and taken the Plasma Frigate. Kyurem will appear here after the player has caught ZekromB2/ReshiramW2 at Dragonspiral Tower.

Entry from the north of Route 13 is blocked until the player pushes the Strength boulder from the Giant Chasm side in Black 2 and White 2.

Trivia

The Giant Chasm and its lore seem to have been inspired by the real-life Tunguska event. A shard of comet struck the Siberian taiga, forming a huge crater and felling trees for miles. Like how Kyurem is thought to have fallen on a comet, and how the Plasma Frigate destroys the forest, the Tunguska event is surrounded by conspiracy theories of aliens and weapons testing.